EP3021103A1 - Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture - Google Patents

Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture Download PDF

Info

Publication number
EP3021103A1
EP3021103A1 EP14192949.7A EP14192949A EP3021103A1 EP 3021103 A1 EP3021103 A1 EP 3021103A1 EP 14192949 A EP14192949 A EP 14192949A EP 3021103 A1 EP3021103 A1 EP 3021103A1
Authority
EP
European Patent Office
Prior art keywords
chamber
gas
outlet
outlet line
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP14192949.7A
Other languages
German (de)
English (en)
Inventor
Zafer Gemici
Süleyman Deveci
Tamer Birtane
Yalcin Öksüz
Ismail Teke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mir Arastirma ve Gelistirme AS
Original Assignee
Mir Arastirma ve Gelistirme AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mir Arastirma ve Gelistirme AS filed Critical Mir Arastirma ve Gelistirme AS
Priority to EP14192949.7A priority Critical patent/EP3021103A1/fr
Publication of EP3021103A1 publication Critical patent/EP3021103A1/fr
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change

Definitions

  • the present invention relates to a non-gas-specific system for use in constant volume/variable pressure gas permeability measurement of a three-dimensional hollow body having one opening, and a relevant measurement method.
  • Diffusion coefficient is one of the important parameters in many applications where polymeric materials are used, such as membrane separation processes, food/beverage packaging, protective coating and casing, and gas transfer in plastic pipes. Therefore, revelation of transfer behavior of gas molecules through polymeric matrices has been an attractive research interest for especially pipe and container producers.
  • test gas flows on a surface of) the other side of the film, both in constant flow rates and usually having same pressure values around the both sides of the film.
  • the test gas is first adsorbed by the film, and diffuses towards the second volume; thus it mixes into and flows along with the inert gas towards a gas specific sensor which measures the amount of the test gas in said mixture.
  • the amount of the test gas versus time is recorded and evaluated for determination of the diffusivity/diffusion coefficient of the test gas through said planar polymeric matrix.
  • Conductivity detector, coulometric detector, infrared spectrometer, electrochemical detector, gas chromatograph or mass spectrometer can be used for this measurement.
  • a coulometric sensor is used for measurement of oxygen transmission rate through a polymer matrix.
  • ASTM D 3985-05 describes a method for measuring gas transmission rate using coulometric sensors.
  • This method requires a sensor selected from abovementioned list, which should be precisely adjusted for measurement of a target gas to be measured. But when measurement of another gas is needed, the sensor must be changed or re-adjusted for said second gas. In case where the sensor is changed, several other relevant data collection equipment might be needed to be changed as well.
  • this method and setup (system) for performing the method can be considered as gas-specific, with a high setup cost and said cost maximizes in case of change in target gas, permeation behavior of which is to be measured.
  • CPVV constant pressure / variable volume' method
  • a planar polymeric matrix is placed inside a chamber such that the chamber is divided into two separate volumes.
  • a test gas is filled into the first volume with a pressure higher than 1 atm.
  • the second volume is in connection with an S-shaped transparent conduit having a distal end open to the atmosphere and facing towards the opposite direction with regard to the gravity force (i.e. upwards), wherein said conduit is partly filled with mercury.
  • Test gas transferring through the polymer matrix into the second volume displaces the mercury against the gravity, and said displacement is recorded versus time as an indicator of diffusion.
  • Constant volume / variable pressure (CVVP) method a.k.a. time-lag method is another commercialized way for measurement the permeability of gases through polymer matrices.
  • CVVP constant volume / variable pressure
  • a planar polymeric matrix, mass transport behavior of which is measured is placed into a cell such that the cell is divided into separate first and second volumes. Both of the volumes are subjected to reduced pressure; afterwards, a test gas with a constant pressure is applied into the first volume, followed by diffusion thereof through the polymer matrix towards the second volume. The pressure values inside the second volume are recorded against time, and evaluated to understand the mass transfer behavior of the matrix. Since the pressure values are used instead of substance concentrations, this method can be considered as a non-gas-specific method.
  • Cylindrical coordinates are taken into account in determination of gas diffusion coefficients and diffusion behaviors of hollow fiber membranes.
  • a bundle of hollow fiber membranes having two opposite ends open, is sealed from one end using a gas-impermeable material e.g. epoxy resin.
  • the other end of the bundle is brought into material connection with a test gas outlet, and the outlet is connected to a test chamber which receives the bundle completely.
  • a test gas which is kept in constant pressure is supplied into the chamber from a gas inlet and leaves the chamber via a gas outlet.
  • the test gas diffuses through the pores on the side walls of the hollow fibers, and flow towards the test gas outlet, to be measured by a gas chromatograph, a gas analyzer or a soap bubble meter.
  • a system and method for use in precise determination of gas permeability behavior of non-planar polymeric matrices is required; especially, for three dimensional hollow bodies having one opening, and wall thickness/diameter ratios thereof are higher than 0.01.
  • Primary object of the present invention is to overcome the abovementioned shortcomings of the prior art.
  • Another object of the present invention is to provide a non-gas-specific system for gas permeability measurement of a three dimensional hollow body having one opening.
  • an object of the present invention is to provide a non-gas-specific method for measuring the gas permeability of a three dimensional hollow body having one opening.
  • a non-gas-specific system for use in constant volume/variable pressure gas diffusion coefficient measurement of a three-dimensional hollow body having one opening said system comprises a sealable chamber having an inlet line, a first outlet line and a second outlet line when sealed, wherein the inlet line comprises an inlet valve for regulated gas inlet into the chamber, the first outlet line comprises a first pressure sensor and a subsequent first outlet valve for, in use, sucking gas out of said body using a vacuum device in interaction with a vacuum sensor, the second outlet line comprises a second outlet valve for, in use, sucking gas out of the chamber using a vacuum device; the chamber is in material connection with a second pressure sensor; the system further comprises a data recording system for, in use, recording the pressures at the first and second pressure sensors; and in use, the chamber receives said body, and said first outlet line is in hermetical connection with the opening of said body.
  • the present invention further proposes a method for performing said measurement. Said method comprises the following sequence:
  • the present invention proposes a non-gas-specific system for use in constant volume/variable pressure gas permeability measurement of a three-dimensional hollow body having one opening.
  • the present invention further proposes a method for performing said measurement.
  • Said system (1) is a non-gas-specific system for use in constant volume/variable pressure gas diffusion coefficient measurement of a three-dimensional hollow body (2) having one opening (15).
  • Said body (2) can originally comprise a plurality of openings, wherein each of said openings except one of them is hermetically sealed, thus said one opening (15) remaining unsealed is for use in said measurement.
  • the system comprises a sealable chamber (3) having an inlet line (4), a first outlet line (5) and a second outlet line (6) when sealed, wherein;
  • FIG. 1(a) A schematic drawing of an embodiment of the system according to the present invention is shown in Fig. 1(a) .
  • first and second outlet lines with regard to the chamber are merged after the respective first and second outlet valves, such that said gas suction through said first and second outlet lines can be applied using a single vacuum device.
  • a schematic drawing according to this embodiment is shown in Fig. 1(b) .
  • the system further comprises a thermal reservoir (17) for, in use, regulating the temperature of said chamber.
  • Said thermal reservoir enables performing the measurement under constant temperature if the facility where the chamber may subject to variable temperature which may affect the precision in the measurement.
  • Said reservoir can be a temperature-controlled water bath.
  • said second pressure sensor is located on the second outlet line, between the chamber and the second outlet valve. This facilitates installation of the second pressure sensor, since the second outlet line can be presumed to be a pipe or hose. For same reason, in a further embodiment according to the present invention, said second pressure sensor is located on the inlet line, between the chamber and the inlet valve; since the inlet line can likewise be presumed to be a pipe, pressure sensor installation on which is convenient.
  • said second pressure sensor is located on the chamber.
  • This embodiment is especially useful in case of pipes or hoses with high L/D ratios are chosen as said inlet line or second outlet line. Since, it is known for a person skilled in the art having basic knowledge on fluids mechanics that high L/D ratios on flow lines may result in considerable pressure drops which may negatively affect the precision of the measurement.
  • said body is a pipe having one opening gas impermeably sealed.
  • this system is very suitable for use in measurement of gas permeability through side walls of a pipe, when the opening at one end of the pipe is sealed with a gas impermeable material.
  • said body is a fluid container for food and/or beverages; since the system of the present invention can be considered suitable for measurement of gas permeability of the walls of jars, bottles etc. as well, especially if said food and/or beverage container is mainly longitudinal wherein the opening is in one longitudinal edge of the container.
  • said system is provided with a computer (16) for receiving and evaluating pressure data from the data recording system (13), and/or for controlling the valves (7, 9, 11).
  • Said data recording system (13) can be a data acquisition equipment (DAQ).
  • a method is also proposed for measuring the gas permeability of a three-dimensional (3D) hollow body having only one opening permitting convective mass transfer therethrough, (e.g. a bottle); or said body can originally comprise a plurality of openings, and for the conduction of said method each of said openings except one of them is hermetically sealed, thus said one opening remaining unsealed is for use in said measurement (e.g. a pipe having one opening sealed, or a tee connection having two openings sealed, etc.).
  • Said method comprises the following sequence:
  • step 'e' the gas diffuses into the polymer matrix of the body, and travels along wall thickness thereof. During this period, the presence of the gas cannot be sensed by the first pressure sensor. Afterwards, the amount of the gas reached into the hollow body start to rise, and after a while, the rise of the pressure values reach to a constant incline.
  • a graph showing the pressure values read from the first pressure sensor versus time is drawn. The time value where the tangent of pressure values versus time graph intersects the time axis represents the time lag (t lag ).
  • gas concentration in the body material and in the body volume is zero; gas concentration in the chamber volume is constant throughout the measurements; and gas diffusion takes place only at radial direction (radially throughout the wall thickness of the body, from outer surface to the inner surface thereof), and gas diffusion coefficient is independent from the gas concentration
  • the system and method according to the present invention Since the measurement of gas transfer through side walls of the body is performed using only the pressure values by not taking the concentrations of any specific gaseous substance into account, the system and method according to the present invention are non-gas-specific.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
EP14192949.7A 2014-11-13 2014-11-13 Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture Withdrawn EP3021103A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14192949.7A EP3021103A1 (fr) 2014-11-13 2014-11-13 Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14192949.7A EP3021103A1 (fr) 2014-11-13 2014-11-13 Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture

Publications (1)

Publication Number Publication Date
EP3021103A1 true EP3021103A1 (fr) 2016-05-18

Family

ID=51870921

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14192949.7A Withdrawn EP3021103A1 (fr) 2014-11-13 2014-11-13 Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture

Country Status (1)

Country Link
EP (1) EP3021103A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111413263A (zh) * 2020-05-06 2020-07-14 西安理工大学 非饱和土水气运动联合测定三轴仪
CN115508256A (zh) * 2022-10-20 2022-12-23 福州大学 一种预埋式测量土的气体渗透系数和扩散系数的注气球

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159829A (en) 1990-12-19 1992-11-03 Modern Controls, Inc. Device for measuring gas permeation
US20040040372A1 (en) * 2002-08-30 2004-03-04 George Plester Method for determining the permeation of gases into or out of plastic packages and for determination of shelf-life with respect to gas permeation
US20040093934A1 (en) * 2002-11-19 2004-05-20 Myung-Suk Chun Device and method for measuring a diffusion coefficient of nano-particle fluid through hollow-fiber micropores
US7121135B2 (en) * 2001-05-18 2006-10-17 Tetra Laval Holdings & Fiance S.A. Method and device for determining the permeation of a barrier layer
GB2437136A (en) * 2006-03-30 2007-10-17 Ltd Technolox Measuring rate of permeation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5159829A (en) 1990-12-19 1992-11-03 Modern Controls, Inc. Device for measuring gas permeation
US7121135B2 (en) * 2001-05-18 2006-10-17 Tetra Laval Holdings & Fiance S.A. Method and device for determining the permeation of a barrier layer
US20040040372A1 (en) * 2002-08-30 2004-03-04 George Plester Method for determining the permeation of gases into or out of plastic packages and for determination of shelf-life with respect to gas permeation
US20040093934A1 (en) * 2002-11-19 2004-05-20 Myung-Suk Chun Device and method for measuring a diffusion coefficient of nano-particle fluid through hollow-fiber micropores
GB2437136A (en) * 2006-03-30 2007-10-17 Ltd Technolox Measuring rate of permeation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SANCHEZ J ET AL: "The application of transient time-lag method for the diffusion coefficient estimation on zeolite composite membranes", SEPARATION AND PURIFICATION TECHNOLOGY, ELSEVIER SCIENCE, AMSTERDAM, NL, vol. 25, no. 1-3, 1 October 2001 (2001-10-01), pages 467 - 474, XP027413152, ISSN: 1383-5866 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111413263A (zh) * 2020-05-06 2020-07-14 西安理工大学 非饱和土水气运动联合测定三轴仪
CN115508256A (zh) * 2022-10-20 2022-12-23 福州大学 一种预埋式测量土的气体渗透系数和扩散系数的注气球

Similar Documents

Publication Publication Date Title
US7685865B2 (en) Method and apparatus for measuring the rate of permeation
US5442948A (en) Apparatus and method for determining amount of gases dissolved in liquids
US5792940A (en) Rapid evaluation of thin-film barrier coatings on thick substrates via transient response measurements
US6067844A (en) Nondestructive method for detection of defects and the condition of liners in polymer-lined pipes and equipment
CN103528909B (zh) 一种气体溶解度的测定装置的使用方法
CN106769689A (zh) 一种变体积恒压下气体在液体中扩散系数的测量装置及方法
JP2008076393A (ja) ピペット又は供給システムを較正する装置と方法
EP3021103A1 (fr) Système et procédé de mesure du coefficient de diffusion de gaz de corps tridimensionnels creux présentant une ouverture
US8079249B2 (en) Gas permeability measurement apparatus
WO2005030109A2 (fr) Schema posologique pour l'administration d'antibiotiques de la classe des rifamycines
US6684685B2 (en) Liquid extrusion porosimeter and method
EP2185946B1 (fr) Dispositif de détermination de coefficient de diffusion de radon
CN203241324U (zh) 一种页岩气体渗透率测定仪
JP2016223924A (ja) ガス透過測定方法とガス透過測定装置
JP5296194B2 (ja) 流体の流量値を決定するための方法及び装置
US20140060159A1 (en) Permeability flow cell and hydraulic conductance system
US20140060158A1 (en) Permeability flow cell and hydraulic conductance system
CN110044789B (zh) 一种最小启动压力及压力波传播速率的测量装置及方法
CN114112776A (zh) 一种基于封闭式循环吸收测量天然气中h2s含量的方法
US9134219B2 (en) Permeability flow cell and hydraulic conductance system
US20140060157A1 (en) Permeability flow cell and hydraulic conductance system
Zeman et al. Evaluation of oxygen permeability of polyethylene films
WO2003060485A1 (fr) Procede et dispositif permettant de determiner la penetration de substances gazeuses a travers une membrane
CN216361583U (zh) 药用玻璃瓶漏孔孔径测量装置
CN109959597B (zh) 一种岩心中油运移速率的测量装置及方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20161119